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Evidence for central nervous system demyelination in chronic inflammatory demyelinating polyradiculoneuropathy

Departments of Neurology and Radiology, Ohio State University Hospitals, Columbus, OH.

It is unclear whether sporadic reports of concurrent multiple sclerosis (MS) and chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) represent coincidence or whether these two demyelinating disorden are pathogenically related. We utilized the sensitivity of magnetic resonance imaging (MRI) in detecting central nervous system (CNS) lesions to investigate 16 patients with CIDP. Six of the 16 had periventricular, subcortical, and brainstem white matter lesions indistinguishable from those seen in MS. Three of these patients had definite clinical and laboratory evidence of MS; three others with abnormal MRIs had no findings indicative of CNS disease. Previous reports have indicated that a significant number of MS patients have peripheral nerve demyelination. Our study suggests that many CIDP patients have concurrent CNS demyelination. Taken together, these observations support the existence of a central-peripheral inflammatory demyelinating syndrome. Whether this combined demyelinating syndrome lies on a spectrum between MS and CIDP or is a separate pathogenic entity will require further investigation.

Address correspondence and reprint requests to Dr. Mendell, Department of Neurology, Ohio State University Hospitals, Columbus, OH 43210.

Supported by a grant from Ohio State University Magnetic Resonance Operating Panel.

Received October 3, 1986. Accepted for publication in final form November 13, 1986.

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